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When severe explosive diarrhea collides with a weak O-Ring at a high velocity (Normally catching the shittee by surprise). Usually, illness causes the pasty, green color.
Digestive fluid will typically cause assburn.

'Normal', brown, explosive/projectile diarrhea is usually referred to as a Chocolate Shotgun.
The difference being in color and the presence of assburn (only seen with the Guacamole Shotgun, other severe illnesses, or very large, healthy pieces of shit).

Bleeding is a common occurance.
"Goddamn, I Guacamole Shotgunned the porcelian to pieces..."
by The_Justin May 30, 2007
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When severe explosive diarrhea collides with a weak O-Ring at a high velocity (Normally catching the shitter by surprise). Usually a severe illness causes the fluidy, green-tinged shit.
Digestive fluid will typically cause assburn.

'Normal', brown, explosive/projectile diarrhea is usually referred to as a Chocolate Shotgun. The difference being in color and the presence of assburn (only seen with the Guacamole Shotgun, other severe illness-related shitting, or very large, healthy pieces of shit).

Bleeding has been known to occur.
Dana: "Holy shit! How's the porcelain on my throne melting?"

Big D: "No joke? Musta been that Guacamole Shotgun I discharged a few minutes ago. It has to be, the assburn is killing me..."

Dana: "W'Teh FUCK?!"
by The_Justin February 04, 2007
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Get a Guacamole Shotgun mug for your sister-in-law Riley.